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Finding the Fourth Proportional to 379,661.60, 569,578.80 and 221,808.80

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Solution

The fourth proportional to 379,661.60, 569,578.80 and 221,808.80 is: 332,763.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,661.60 : 569,578.80 = 221,808.80 : x
  2. Step 2: Convert to fraction form
    379,661.60/569,578.80 = 221,808.80/x
  3. Step 3: Cross multiply
    379,661.60x = 569,578.80 × 221,808.80
  4. Step 4: Simplify right side
    379,661.60x = 126,337,590,133.44
  5. Step 5: Solve for x
    x = 126,337,590,133.44/379,661.60
  6. Step 6: Final answer
    x = 332,763.68

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.